名词
中文翻译：回火煤
同义词：
['retort coke', 'retort coal']
例句：
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1.The retort coke is used to make steel in the blast furnace.
回火煤用于炼钢炉中制造钢铁。
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2.The retort coke is a byproduct of the iron-making process.
回火煤是炼铁过程的副产品。
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3.The retort coke is also used as a fuel for power plants.
回火煤也被用作发电厂的燃料。